Just downloaded it, its the 15th book in the series. Great fun, with a great cast of characters, I highly recommend the series.

1 Omega Rising (2013)
2 Soldiers of Fortune (2013)
3 Savage Homecoming (2013)
4 The Enemy Within (2014)
5 Return of the Archon (2014)
6 Secret of the Phoenix (2014)
7 Redemption (2015)
8 The Human Factor (2016)
9 Revolution (2017)
10 Legends Never Die (2018)
11 Rebellion (2019)
12 The Pandora Paradox (2020)
13 To Hell and Back (2021)
14 Unleashed (2022)
15 Dead Reckoning (2023)